Android: We've had a Kindle app for the iPhone for awhile, and more recently for BlackBerry, but today, Amazon released the long-awaited Kindle for Android application, allowing you to read Amazon ebooks on your smartphone, whether or not you have a Kindle.

There are already a few ways to read books on your Android phone, but this is the app everyone's been waiting for. Now you can browse Amazon's Android-optimized ebook store in the browser and download books straight to your device.

After you download a book (or a free book sample), it will appear in the Kindle app and you can read it with the app's touch-friendly interface. Just like with the iPhone, you can adjust text size, add bookmarks, view annotations, and turn pages easily with a flicking motion or tapping the corner of the page. And, if you have a Kindle, Amazon's Whispersync feature will make sure your last read page and annotations stay the same on all your devices.